![subject](/tpl/images/cats/himiya.png)
A researcher wanted to test the effectiveness of different levels of sunscreen on time it takes to get a sunburn. The
researcher plans find participants age 20 - 30 that all have moderate risk for sunburns. One group will wear SPF 30,
another group will wear SPF 50, and the third group will not wear sunscreen. The participants will be outside for 3 hours of
sun exposure. He will record the time it takes for sunburn to set in (if any occurs) and the severity.
Help
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 01:40
Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?
Answers: 1
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 19:00
How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 21:30
What is the effect of returning nuclear reactor cooling water back into bodies of water?
Answers: 3
You know the right answer?
A researcher wanted to test the effectiveness of different levels of sunscreen on time it takes to g...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 15.07.2019 02:30
![question](/tpl/images/cats/biologiya.png)
Biology, 15.07.2019 02:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
Mathematics, 15.07.2019 02:30
![question](/tpl/images/cats/ekonomika.png)
Business, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
Business, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 15.07.2019 02:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 15.07.2019 02:30
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 15.07.2019 02:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 15.07.2019 02:30
![question](/tpl/images/cats/mat.png)
Mathematics, 15.07.2019 02:30
![question](/tpl/images/cats/biologiya.png)
Biology, 15.07.2019 02:30